MetaGPT vs 
Letta
MetaGPT vs Letta compared for 2026 — features, license, ease of use, performance and which one to choose. A software company of LLM agents vs Stateful agents with long-term memory.
Updated regularly · curated by olud.ai
MetaGPT vs Letta at a glance
| Spec | MetaGPT | Letta |
|---|---|---|
| Category | AI agent framework | AI agent framework |
| Type | Multi-agent framework | Agent runtime (memory) |
| License | MIT | Apache-2.0 |
| Runs locally | Cloud-optional | Self-hosted |
| Primary language | Python | Python |
| Ease of use | Advanced | Advanced |
| Best for | turning specs into multi-file projects | agents that remember across sessions |
| GitHub stars | — | 23.9k |
How MetaGPT and Letta score
| Criterion | MetaGPT | Letta |
|---|---|---|
| Popularity | n/a | 3.5 |
| Maintenance | n/a | 5.0 |
| Ease of use | 2.5 | 2.5 |
| Privacy | 3.5 | 4.5 |
| License freedom | 5.0 | 5.0 |
Scores are computed automatically from public signals — GitHub stars (popularity), recent commit activity (maintenance), license type (freedom), local-first design (privacy) and onboarding complexity (ease of use). Indicative, not a verdict.
What each one is
MetaGPT
MetaGPT assigns roles like product manager, architect and engineer to multiple LLM agents that collaborate to turn one line of requirements into code, docs and diagrams.
- Role-based multi-agent collaboration
- Generates code, docs and diagrams together
- Large, active community
Letta
Letta (formerly MemGPT) is a framework and server for building stateful agents with long-term memory that persists across sessions, with a visual agent editor.
- Persistent long-term agent memory
- Server with REST API and visual editor
- Model-agnostic and self-hostable
Key differences
MetaGPT is multi-agent framework, while Letta is agent runtime (memory). Their licenses differ (MIT vs Apache-2.0), which matters if you ship a commercial product. They also differ in how they run (Cloud-optional vs Self-hosted). In short, MetaGPT fits turning specs into multi-file projects, and Letta fits agents that remember across sessions.
Which should you choose?
Choose MetaGPT for turning specs into multi-file projects. Choose Letta for agents that remember across sessions.
There is rarely one winner — many setups use both. The right pick depends on your hardware, your team's skills, and whether you value simplicity or control.
Frequently asked questions
Is MetaGPT or Letta easier to use?
Both sit at a similar level (Advanced). Your choice should come down to fit rather than difficulty.
Are MetaGPT and Letta free?
MetaGPT is free and open source (MIT), and Letta is free and open source (Apache-2.0). Neither charges for the core software.
Can I run MetaGPT and Letta locally?
MetaGPT: cloud-optional · Letta: self-hosted. Both can be used without sending your data to a third-party cloud where their setup allows.
MetaGPT vs Letta — which should I pick in 2026?
Choose MetaGPT for turning specs into multi-file projects. Choose Letta for agents that remember across sessions.
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